PPIF (Peptidylprolyl Isomerase F): PPIF,also known as cyclophilin D, is an important mitochondrial enzyme that regulates the mitochondrial permeability transition pore (MPTP). This pore plays a critical role in controlling cell death processes like apoptosis and necrosis. PPIF’s activity is essential in these pathways, and its inhibition has been studied as a potential therapeutic approach for conditions such as ischemia-reperfusion injury, including heart attack and stroke.